CN215214691U

CN215214691U - Hydraulic hammer middle cylinder

Info

Publication number: CN215214691U
Application number: CN202120371465.3U
Authority: CN
Inventors: 罗斌; 邱东峰
Original assignee: Anhui Anrui Intelligent Construction Machinery Co ltd
Current assignee: Anhui Anrui Intelligent Construction Machinery Co ltd
Priority date: 2021-02-17
Filing date: 2021-02-17
Publication date: 2021-12-17
Anticipated expiration: 2031-02-17

Abstract

The middle cylinder is used as an important part of the hydraulic hammer, the temperature can rise in the working process, the middle cylinder is thermally deformed due to the change of the temperature, if the oil circuit layout of the middle cylinder is unreasonable, the middle cylinder is inevitably heated unevenly, the uneven heating causes deformation in different degrees and damage, the unreasonable oil circuit layout not only affects the thermal deformation of the middle cylinder of the hydraulic hammer, but also affects the mechanical strength of the middle cylinder of the hydraulic hammer, and the technical defect is overcome by the middle cylinder of the hydraulic hammer.

Description

Hydraulic hammer middle cylinder

Technical Field

The invention relates to an engineering machinery accessory, in particular to a hydraulic hammer middle cylinder.

Background

The hydraulic hammer is an impact machine which can convert hydraulic energy into mechanical energy, and is characterized by that it possesses two basic moving components of piston and reversal valve, and they are mutually feedback-controlled, i.e. the reciprocating movement of valve core can control the reversal of piston, and the starting and ending points of every stroke of piston can implement reversal of valve core by means of opening or closing control oil circuit of reversal valve.

To break stone, concrete and other building materials, the hydraulic hammer may be attached to various machines, such as an excavator, a backhoe or other similar machines. The hydraulic hammer is mounted to the arm of the machine and is connected to a hydraulic system. High pressure fluid in the hydraulic system is supplied to the hydraulic hammer to drive a piston in contact with the work tool to reciprocate and strike the work tool, completing the crushing task.

The middle cylinder is used as an important part of the hydraulic hammer, the reasonability of the structure of the middle cylinder is critical, the hydraulic hammer works in the process of working, the temperature of hydraulic oil of a host can rise, the temperature change can lead the middle cylinder to generate thermal deformation, if the oil circuit layout of the middle cylinder is unreasonable, the middle cylinder is inevitably heated unevenly, uneven heating can cause deformation in different degrees, the originally qualified size precision and form and position tolerance precision of the middle cylinder can not reach the design requirement, parts matched with the middle cylinder can not reach the design clearance, and damage is caused. In addition, the unreasonable layout of the oil passages not only affects the thermal deformation of the cylinder in the hydraulic hammer, but also affects the mechanical strength of the cylinder.

Disclosure of Invention

The utility model discloses to the overall arrangement of oil circuit to influence of centering jar heat altered shape and structural strength, provide a cylinder in the hydraulic hammer in order to overcome prior art defect.

For realizing the utility model discloses the technological effect that will reach is implemented through several aspects:

and an oil return ring groove is arranged on the inner side of the oil seal groove, and is communicated with an oil return port of the reversing valve and an oil return port of the piston ring through an auxiliary oil return hole to communicate with oil return of the hydraulic hammer.

In order to avoid the phenomenon that the stress of a middle cylinder fitting piece is uneven due to the fact that the circumferential oil return of the oil return annular groove is asymmetrical, the oil return annular groove is communicated with the main oil return hole.

The oil inlet of the hydraulic hammer is communicated with the oil inlet of the reversing valve and the oil port of the energy accumulator.

In order to increase the flow of the oil circuit in the middle cylinder, the oil circuit is arranged to enable the accumulator to be communicated with the oil inlet of the reversing valve.

In order to avoid the cooperation piece collision in oil blanket groove and the cylinder body, cause the seal groove to damage, this structure oil blanket groove diameter is greater than the cylinder body diameter.

For the structural strength of the cylinder body, the main oil return hole of the middle cylinder adopts a step hole structure.

Drawings

Fig. 1 is an isometric view of a cylinder.

Fig. 2 is an isometric view of the cylinder.

Fig. 3 shows a sectional view of the cylinder and a left side view.

Fig. 4 is a sectional view a-a.

Fig. 5 is a sectional view B-B.

Fig. 6 is a partially enlarged view.

Detailed Description

The embodiments of the present invention will be described in detail with reference to the accompanying drawings (main drawings: fig. 3 and 4).

Description of reference numerals:

1. the oil seal groove 2, the oil return ring groove 3, the auxiliary oil return hole 4, the reversing valve oil return port 5, the piston ring oil return port 6, the main oil return 7, the oil inlet hole 8, the reversing valve oil inlet 9, the accumulator oil port 10 and the auxiliary oil inlet path.

An oil return annular groove 2 is arranged on the inner side of the oil seal groove 1, and the oil return annular groove 2 is communicated with a reversing valve oil return port 4 and a piston ring oil return port 5 through an auxiliary oil return hole 3 and is communicated with a main oil return 6 of the hydraulic hammer.

In order to avoid the phenomenon that the stress of a middle cylinder fitting piece is uneven due to the fact that the circumferential oil return of the oil return annular groove 2 is asymmetrical, the oil return annular groove 2 is communicated with the main oil return 6.

And an oil inlet hole 7 of the hydraulic hammer is communicated with an oil inlet 8 of the reversing valve and an oil outlet 9 of the energy accumulator.

In order to increase the flow of the oil path inside the middle cylinder, an auxiliary oil inlet path 10 is provided to communicate the accumulator oil port 9 with the reversing valve oil inlet 8.

In order to avoid the collision of the mating pieces in the oil seal groove 1 and the cylinder body and cause the damage of the seal groove 1, the diameter A of the oil seal groove 1 of the structure is larger than the diameter B of the cylinder body.

For the structural strength of the cylinder body, the middle cylinder main oil return 6 adopts a step hole structure.

Claims

1. The utility model provides a cylinder in hydraulic hammer which characterized in that: an oil return annular groove (2) is formed in the inner side of the oil seal groove (1), the oil return annular groove (2) is communicated with an oil return port (4) of a reversing valve and an oil return port (5) of a piston ring through an auxiliary oil return hole (3), a main oil return (6) of the hydraulic hammer is communicated, and meanwhile, the oil return annular groove (2) is communicated with the main oil return (6); an oil inlet hole (7) of the hydraulic hammer is communicated with an oil inlet (8) of the reversing valve and an oil port (9) of the energy accumulator; the auxiliary oil inlet path (10) enables the oil port (9) of the energy accumulator to be communicated with the oil inlet (8) of the reversing valve.

2. A cylinder in a hydraulic hammer as set forth in claim 1, wherein: the diameter (A) of the oil seal groove (1) is larger than the diameter (B) of the cylinder body.

3. A cylinder in a hydraulic hammer as set forth in claim 1, wherein: the middle cylinder main oil return (6) adopts a step hole structure.